PythonTalk02.tex

\input{LatexConfig.tex}

\begin{document}

\PreFirstFrame
\begin{frame} [fragile]
	\centerline{\fontsize{42}{42}\selectfont Python Talk 2}
\end{frame}
\PostFirstFrame

\begin{frame} [fragile]
	\frametitle{复习}
	\linespread{2}
	\begin{columns}[T]
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item 计算下列数值
				\begin{itemize}
				\item 一百加二十
				\item 一天有多少秒
				\item 真或假
				\item 三的一百次方
				\end{itemize}
			\end{itemize}
		\end{column}
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item 答案
				\begin{itemize}
				\item \inlinePython{100 + 20}
				\item \inlinePython{24 * 60 * 60}
				\item \inlinePython{True or False}
				\item \inlinePython{3 ** 100}
				\end{itemize}
			\end{itemize}
		\end{column}
	\end{columns}
\end{frame}

\begin{frame} [fragile]
	\frametitle{复杂数据类型}
	\linespread{2}
	\begin{columns}[T]
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item 常用类型
				\begin{itemize}
				\item 元组：\inlinePython{tuple}
				\item 列表：\inlinePython{list}
				\item 字符串：\inlinePython{str}
				\item 字典：\inlinePython{dict}
				\end{itemize}
			\item 其他类型
				\begin{itemize}
				\item 集合：\inlinePython{set}
				\end{itemize}
			\end{itemize}
		\end{column}
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item 举例
				\begin{itemize}
				\item \inlinePython{(1, 2, 3)}
				\item \inlinePython{('h', 'c', 'c')}
				\item \inlinePython{"HCC, I'm. "}
				\item \inlinePython|{1: 'H', 2: 'C'}|
				\end{itemize}
			\item 举例
				\begin{itemize}
				\item \inlinePython|{1, 2, 3}|
				\end{itemize}
			\end{itemize}
		\end{column}
	\end{columns}
\end{frame}

\begin{frame} [fragile]
	\frametitle{创建你自己的复杂数据}
	\linespread{1.5}
	\begin{columns}[T]
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item \inlinePython{(a, b, c)}
			\item \inlinePython{[a, b, c]}
			\item \inlinePython{'Some_Letters'}
			\item
			\begin{lstlisting}[style=pythonstyle, gobble=12]
			{
				key_A: value_A,
				key_B: value_B
			}
			\end{lstlisting}
			\end{itemize}
		\end{column}
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item 所有元素都可以换成更复杂的类型
			\item 基本类型
				\begin{itemize}
				\item \inlinePython{int		float	bool}
				\end{itemize}
			\item 复杂类型
				\begin{itemize}
				\item \inlinePython{tuple	list	str}
				\item \inlinePython{dict	set}
				\end{itemize}
			\item \inlinePython{type}
			\end{itemize}
		\end{column}
	\end{columns}
\end{frame}

\begin{frame} [fragile]
	\frametitle{细节}
	\linespread{1.25}
	\begin{columns}[T]
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item 创建一个元素的 \inlinePython{tuple}
			\begin{lstlisting}[style=pythonstyle, gobble=12, texcl]
			('HCC')		# 失败
			('HCC',)	# 正确
			\end{lstlisting}
			\item \inlinePython{list}和\inlinePython{dict}也支持
			\end{itemize}
		\end{column}
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item \inlinePython{str}创建方式
				\begin{itemize}
				\item 单引号
				\begin{lstlisting}[style=pythonstyle, gobble=16, texcl]
				'HCC, I\'m. '
				\end{lstlisting}
				\end{itemize}
				\begin{itemize}
				\item 双引号
				\begin{lstlisting}[style=pythonstyle, gobble=16, texcl]
				"HCC, I'm. "
				\end{lstlisting}
				\end{itemize}
				\begin{itemize}
				\item 多行字符串
				\begin{lstlisting}[style=pythonstyle, gobble=16, escapechar=@]
				@\color{Pink}\textquotesingle\textquotesingle@'
				HCC
				'''
				\end{lstlisting}
				\end{itemize}
			\end{itemize}
		\end{column}
	\end{columns}
\end{frame}

\begin{frame} [fragile]
	\frametitle{\inlinePython{tuple}和\inlinePython{list}有什么区别}
	\linespread{1.5}
	\begin{columns}[T]
		\begin{column}[T]{.5\textwidth}
			\begin{lstlisting}[style=pythonstyle, gobble=12, texcl]
			a = ()		# tuple
			b = []		# list
			help(a)
			help(b)
			# 你能找到区别吗？
			\end{lstlisting}
		\end{column}
		\begin{column}[T]{.5\textwidth}
			\begin{itemize}
			\item \inlinePython{insert}
			\item \inlinePython{pop}
			\item \inlinePython{remove}
			\item \inlinePython{reverse}
			\item \inlinePython{sort}
			\end{itemize}
		\end{column}
	\end{columns}
\end{frame}

\begin{frame} [fragile]
	\frametitle{尝试基本运算符}
	\begin{itemize}
	\item 加法
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl]
	(1, 2) + (5, 6)
	[1, 2] + [5, 6]
	'HCC' + ", I'm."
	\end{lstlisting}
	\item 乘法
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl]
	(1, 2) * 3
	'HCC' * 10
	\end{lstlisting}
	\item 合并\inlinePython{dict}
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl]
	{1: 2} + {3: 4}		# 失败
	a = {1: 2}
	a.update({3: 4})
	print(a)			# 正确
	\end{lstlisting}
	\end{itemize}
\end{frame}

\begin{frame} [fragile]
	\frametitle{字符串方法}
	\linespread{1.5}
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl, escapechar=@]
	"HCC, I'm. ".upper()	# 大写
	"HCC, I'm. ".lower()	# 小写
	"HCC, I'm. ".split()	# 按空白字符分割
	len("HCC, I'm. ")		# 得到长度
	'&'.join([1, 2])		# 合并
	@\color{Pink}\textquotesingle\textquotesingle@'Hello from HCC:
	Welcome!
	'''.split('\n')			# 按换行符分割
	\end{lstlisting}
\end{frame}

\begin{frame} [fragile]
	\frametitle{分割}
	\linespread{1.5}
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl]
	a = [1, 2, 3, 4, 5, 6, 7, 8, 9]
	a[4]
	a[4: 7]
	a[2: -2: 2]
	a = 'abcdefghijklmnopqrstuvwxyz'
		# 重复上面三行
	{'a': 'b', 'b': 'c'}['b']
	\end{lstlisting}
\end{frame}

\begin{frame} [fragile]
	\frametitle{原理}
	\linespread{2}
	\begin{lstlisting}[basicstyle=\ttfamily,upquote=true,
						showstringspaces=false,tabsize=4,columns=fixed]
	   H   C   C   ,   I   '   m   .
	 0   1   2   3   4   5   6   7   8
	-8  -7  -6  -5  -4  -3  -2  -1
	\end{lstlisting}
\end{frame}

\begin{frame} [fragile]
	\frametitle{练习}
	\linespread{1.5}
	\begin{itemize}
	\item 对于这些字符串，截取出用户名（\inlinePython{'@'}前面）
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl]
	'HCC@shiyiquan.net'
	'lxy@shiyiquan.net'
	'mbl@shiyiquan.net'
	'shiyiquan@shiyiquan.net'
	\end{lstlisting}
	\item 你能使用两种方式吗？提示：分割和 split
	\item 哪种方式还可以正确截取这些字符串？
	\begin{lstlisting}[style=pythonstyle, gobble=4, texcl]
	'HCC@hcc.io'
	'lxy@shierquan.tk'
	\end{lstlisting}
	\end{itemize}
\end{frame}


\PreLastFrame
\begin{frame}
	\centerline{\fontsize{32}{32}\selectfont 感谢参加此次活动}
\end{frame}

\newpage
\end{document}